We have the job to realize a page with custom sidebars. Sidebars can be created on the fly on post an page edit screens, to add a custom sidebar on each page.
The client wants to use this to add additional information, links and elements to the page/post content.
This is not the problem. The problem starts when you want to maintain the sidebars. The widgets section in the admin screen is simply not built to handle that many sidebars. It is technically possible, but the usability is horrible.
So the question is: Is there an elegant way to either add filtering to the widgets screen, or is it possible to replicate sidebar editing and widget administration in a post meta box?